Which one of the following configuration represents a noble gas

$1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2}$

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$1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{1}$

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$1 s^{2}, 2 s^{2} 2 p^{6}$

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$1 s^{2}, 2 s^{2} s p^{6}, 3 s^{2} 3 p^{6}, 4 s^{2}$

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Solution

The correct option is C
$1 s^{2}, 2 s^{2} 2 p^{6}$

$1 s^{2}, 2 s^{2}, 2 p^{6}$ represents a noble gas electronic configuration.

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